9. O 6/8 points | Previous Answers CJ102.P065 A person who walks for exercise produces the position me graph given below. +1.25 +1.00 Position() D +0.75 050 0.25 0 020 040 000 000 1.00 Time 00 (a) Without doing any calculations, decide which segments of the graph (A, B, C, or D) indicate positive, negative, and zero average velocities. A positive B zero C negative D positive (b) Calculate the average velocity for each segment to verify your answers to part (a). A 138 B0 C 8.64 m/s D m/s m/s x m/s Additional Materials.